System.Windows.Forms.XplatUICarbon.PerformNCCalc C# (CSharp) Method

		internal void PerformNCCalc(Hwnd hwnd) {
			XplatUIWin32.NCCALCSIZE_PARAMS  ncp;
			IntPtr ptr;
			Rectangle rect;

			rect = new Rectangle (0, 0, hwnd.Width, hwnd.Height);

			ncp = new XplatUIWin32.NCCALCSIZE_PARAMS();
			ptr = Marshal.AllocHGlobal(Marshal.SizeOf(ncp));

			ncp.rgrc1.left = rect.Left;
			ncp.rgrc1.top = rect.Top;
			ncp.rgrc1.right = rect.Right;
			ncp.rgrc1.bottom = rect.Bottom;

			Marshal.StructureToPtr(ncp, ptr, true);
			NativeWindow.WndProc(hwnd.client_window, Msg.WM_NCCALCSIZE, (IntPtr)1, ptr);
			ncp = (XplatUIWin32.NCCALCSIZE_PARAMS)Marshal.PtrToStructure(ptr, typeof(XplatUIWin32.NCCALCSIZE_PARAMS));
			Marshal.FreeHGlobal(ptr);


			rect = new Rectangle(ncp.rgrc1.left, ncp.rgrc1.top, ncp.rgrc1.right - ncp.rgrc1.left, ncp.rgrc1.bottom - ncp.rgrc1.top);
			hwnd.ClientRect = rect;

			rect = TranslateClientRectangleToQuartzClientRectangle (hwnd);

			if (hwnd.visible) {
				Carbon.HIRect r = new Carbon.HIRect (rect.X, rect.Y, rect.Width, rect.Height);
				HIViewSetFrame (hwnd.client_window, ref r);
			}
	
			AddExpose (hwnd, false, 0, 0, hwnd.Width, hwnd.Height);
		}